将json数据循环到for循环中 [英] Loop json data into for loop
问题描述
嗨Ppl，
我试图将Json ouptut循环到for循环并将它们存储到另一个数组中，因为我只需要来自Json的特定值... 。
这里是代码...我无法获取DTSTART，DTEND字段..我猜它是因为命名..我无法改变param名字，因为我从输出中收到它。
任何想法如何获得这些id的值？谢谢
Hi Ppl,
I am trying to loop the Json ouptut into for loop and store them into another array as i need only specific values from Json....
here is below code... i am unable to fetch DTSTART,DTEND fields.. i guess its because of naming.. i wont be able to change the param names as i receive it from output.
Any idea how to get the value of those ids also? Thanks
<!DOCTYPE html>
<html>
<body>
<p>Looping through arrays inside arrays.</p>
<p id="demo"></p>
<script>
var myObj, i, j, x = "";
myObj = {
"cars": [
{
"DTSTART;TZID=America/New_York": "20170211T123000",
"DTEND;TZID=America/New_York": "20170211T133000",
"RRULE": "FREQ=WEEKLY;BYDAY=SA",
"DTSTAMP": "20170213T195454Z",
"UID": "ks0lgptphtr46rdt4a6p94l2f8@google.com",
"CREATED": "20170211T152911Z",
"DESCRIPTION": "",
"LASTMODIFIED": "20170211T152911Z",
"LOCATION": "",
"SEQUENCE": "0",
"STATUS": "CONFIRMED",
"SUMMARY": "monday meeting",
"TRANSP": "OPAQUE"
}
]
}
for (i in myObj.cars) {
x += "<h1>" + myObj.cars[i].SUMMARY + "</h1>";
x += "<h1>" + myObj.cars[i].DTSTART + "</h1>";
}
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>
我尝试过：
以下是执行代码
Tryit Editor v3.3 [ ^ ]
推荐答案
好的，由于键命名的未定义错误，键名为DTSTART; TZID = America / New_York 而不是DTSTART。根据您描述的情况，这里有一个使用/ startsWith等键访问数组值的替代方法。现在，您的下一个任务是弄清楚如何以您喜欢的顺序显示结果，因为循环从上到下开始。
Ok, the undefined error because of the key naming, the key name is "DTSTART;TZID=America/New_York" and not "DTSTART". Based on the circumstances you describe, here is an alternative to access the array value using key like/startsWith. Now, your next assignment is to figure out how to display the result in the order that you prefer because the loop start from top to bottom.
for (var i = 0; i < myObj.cars.length; i++){
var obj = myObj.cars[i];
for (var key in obj){
if (key == "SUMMARY") {
x += "<h1>" + obj[key] + "</h1>";
}
if (key.startsWith("DTSTART")) {
x += "<h2>" + obj[key] + "</h2>";
}
}
}
输出：
20170211T123000
星期一会议
Output:
20170211T123000
monday meeting
就像添加square []一样简单，即
It is as simple as adding a square [], i.e.
myObj.cars[i]["DTEND;TZID=America/New_York"]尽管如此，尽量避免像这样的异常密钥，因为它会打破那些通常的JSON处理代码。
Nevertheless, try to avoid unusual keys like this as it is going to break those usual JSON handling code.
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